Holder



April 1.3, 1943. c. F. ANDERSON 2,316,545

HOLDER Filed Jan.v 2, 1940 INVENTOR ATTORNEY Patented Apr. 13, 1943 unire-D STATES OFFICE 'l'his invention vhas .relation to a holder lfor a str1p. of material adapted .to be employed for abr-ading or polishing purposes, as, for example, a strip of. abrasive or emery cloth or paper, or a strip .of felt, etc. More explicitly, the .invention relates to. a, cylindrical holder designed to be mounted. for rotation .and adapted removably to retain astrip of abrading orv .polishing material aboutandrinrm and closeengagement withits periphery.

An objectof theinventionis.toprovide a holder of. the presenttype whichr will be of novel and improved construction.

A furtherobjectvis to provide a holder, for removably retaining a stripof material adapted to be employed forv abradng or polishing purposes, wherein, will be incorporated various improved features andY characteristics.ofconstruction novel both as individualentitiesof the holder and in combination witheach other.

Anda. further object is to .provide a cylindrical holder, designed to vbe mountedforfrotaton and adapted .removably to retaina. strip Vof abrading or polishing material, which willf'beofsimple construction and canbeinexpensivelymanufactured.

With the -aboveobjects in View, las well as otherswhich willappear-as the specification proceeds, the .invention comprises lthe construction, arrangement and combination of parts'as now to be fullygdescri-bed andas hereinafter `to be specifically claimed',v ity-being understood that the'disclosure herein is .merelyillustrative and-intended in-no way inra, limiting sense, changes in details of construction and arrangement-of. parts beingv permissible so long aswithin the-spirit. of the invention and the scope of the claims which follow.

In the accompanying drawing forming `a part of lthis,speciications Fig. 1 is.- an. end elevational. view, partially broken away-.of a holder Amadefaccording to the invention;

Fig. -2 isa central sectional view of the holder, taken online 2-2 in Fig. l;

Eig. y3 is an enlarged iragmentaryview detailing features-of theY invention, disclosing elements at Ythe yupperportion of the illustrations of Figs. l and: Zif'as said' elements `would appear from the position. designated by 'lineV 3 3 in said Fig. 2 with-the adjacent ihalf or part of the shell o'f the holder removed-'and with a strip'of abrading orl polishing materialapplie'd upon or to the periphery vof the opposite half or part of said shell of saidfholder;

Fig; 4- is a vievvcorresponding with the disclosure-of-lig. 3, but showingthemovableor rotatable tighteningand vfastening ydevice-of the .holder inone of its inoperative positions;

Fig..5 is an :elevational View of said movable or rotatabletightening andfastening device'as when removed from the remainder of the holder;

Fig. 6 isan elevational View, partially in section and `partially broken away, of the stationary tightening and fastening device of the holder as when removed from the remainder of said holder;

vide. the cylindrical shell I()l the complemental` halves or. parts thereof Iare secured rigidly to each other, in a manner to beset forth, withthe marginal edges I3 ofthe skirt portions I2. in

abutting engagement. The .outercylindrical surface ofv eachskirt portion I2 is coveredby a .piece I4 of leather, or .other flexible .element or substance, and the adjacent margins or edges I5 of the diierentpieces. l-desirably are in abutting relation when. the halves or parts of the cylinf drical shell I are assembled together. Stated otherwise, theY pieces Mofleather, or equivalent,y

together .provide a, complete. covering for both skirt, portions I2, and said pieces Ilare rigidly secureduponor to the outer cylindrical surfaces of said skirt .portions I2. Themarginal edges. I3V

are parallel with the annular bases I-I, and said basesare perpendicular to theaxisfor the holder passing through the bases. Spaced bearings for rotatably supporting the holder are provided by spaced-openings, denoted I6, I6, arranged centrally in the Yannular baSesII, II, respectively..

Saidispaced bearings or openings I6,` I5 are concentric With'the cylindrical skirt portions I2 of the holder when assembled, and. provide means through the instrumentality ofwhich said holder canA be xed lin any suitableand convenient manner Vupon -a shaft or member. adapted to be ro-` tated. l

vIn-the disclosure as made, a hollow connector tube yIl is disposed in surrounding relation to the spaced or opposite bearings I6, I8, and the opposite ends, respectively, of said connectortube integrally carry spaced extension lugs I8 which are imbedded in and secured in slots in the annular bases I I. The hollow connector tube l l is perpendicular to said annular bases II, and constitutes means at the central portionof the holder designed .to the purpose of retaining thetwo. halves or parts of the cylindrical shell Il) in xed relation to each other. The opposite ends of the connector'tube .I1 in the illustrated embodiment of the invention are in engagement with the inner or adjacent surfaces, respectively, of the f annular basesV I I.

A stationary tightening and fastening device of the holder is constituted as a hollow cylindrical element I9 xedly supported by and between the annular bases II of said holder and situated at a side of the hollow connector tube I1 in slightly spaced relation to the circumference cf perimeter of the hollow cylindrical shell I0, provided by the two skirt portions I 2 and the two pieces I4 of leather, or equivalent. Said hol- 10W cylindrical element I9 integrally Carries spaced extension lugs 29 upon its opposite ends, respectively, which are imbedded in and secured in slots in the annular bases Il. The hollow cylindrical element I9 is parallel with the hollow connector tube I1, as well as perpendicular to the annular bases II, and constitutes means at one side of the holder designed to the purpose of retaining the two halves or parts of the hollow cylindrical shell I9 in xed relation to each other. The opposite ends of the stationary tightening andk fastening device or hollow cylindrical ele-` ment I9 as disclosed are in engagement with the inner or adjacent surfaces, respectively, of the annular base II.

The side of said stationary tightening andV fastening device or hollow cylindrical element I 9 which is adjacent to the circumference or perimeter of said cylindrical shell I0 is cut away to provide a clearance or passageway 2I extending longitudinally of said device or element I9 for the width of the hollow cylindrical shell, and said circumference or perimeter of the hollow cylindrical shell; or, more explicitly, the skirt portions I2 and the pieces i4 of leather, or equivalent, which provide said circumference or perimeter; is cut away atlocation directly adjacent the clearance or passageway 2| to provide a clearance or passageway 22 also extending longitudinally of the device or element I9 for the width of said hollow cylindrical shell and disposed in aliningi relation to said clearance or passageway 2| in direction radially of said hollow cylindrical shell., That is, the clearances or passageways 22 and 2'I provide for access to the interior of the stationary tightening and fastening device or hcllow cylindrical element I3, to a purpose which presently will be made to appear.

A movable or rotatable tightening and fastening device of the holder is situated within the hollow cylindricalelement i9 and is supported by the bases II of the holder. More explicitly, the movable or rotatable tightening and fastening device is constituted as a cam including a shaft 23 thereof having its opposite ends 24 rotatably mounted in the annular bases I I, I I, respectively,` and an eccentric portion 25 thereof integral or rigid with said shaft 23. As illustrated, the eccentric portion 25 of said cam has length substantially equal to the distance between the spaced apart annular bases II. Stated otherwise, said eccentric portion of the cam extends the full distance between the annular bases II and is parallel with the hollow cylindrical element I9. vThe shaft 23 of the cam,including the end portions 24 of said shaft, is situated concentrically of said hollow cylindrical element I9 and is perpendicular to the bases I I, II of the hollow cylindrical shell Ill. Both ends 24 of the shaft 23 are accessible at the outer sides of the bases II, and at least one of said ends 24 is provided with an angular or squared opening 26 for receiving a wrench or other tool adapted to be employedto rotate the cam upon its axis.v

In order that the holder will be nicelybalanced when fixed, as by employment of the spaced bearings IB, upon a shaft adapted to be rotated, said holder includes a counterweight cr balance weight 21 which is disposed within the hollow cylindrical shell I0 at the side thereof directly opposite the stationary tightening and fastening device and the movable or rotatable tightening and fastening device. Said weight 21 in the illustrated embodiment of the invention is constituted as a solid block integrally carrying annular extension lugs 28 upon its opposite ends, respectively, which are imbedded in and secured in annular openings in the annular bases II. The weight or block 21 is parallel with and in spaced relation to the hollow connector tube I1, as well as perpendicular ,to the annular bases II, and constitutes means at the side of vthe holder opposite the stationary tightening and fastening device and the movable or rotatable tightening and fastening device designed to the purpose of retaining the two halves or parts of said hollow cylindrical shell IU in fixed relation to each other. The opposite ends of the weight or block 21 as disclosed are in engagement with the inner or adjacent surfaces, respectively, of the annular bases II.

The stationary tightening and fastening device, constituted as the hollow cylindrical element I9, and the movable or rotatable tightening and fastening device, constituted as the cam including the shaft 23 and the eccentric portion 25, together comprise complemental means of the holder designed and adapted, the one in cooperation with the other, to cause a strip of material 29, adapted to be employed for abrad- Ving or polishing purposes, such as a strip of abrasive or emery cloth or paper, or a strip of felt, etc., to be tightened about and removably fastened down against the circumference or perimeter of the hollow cylindrical shell I0.

Any strip of material, such as the strip 29, to be tightened and removably fastened upon the circumference or perimeter of said hollow cylindrical shell I0 normally will have free opposite end portions 30. In practice, a roll of material suitable for abrading or polishing purposes desirably will be provided, and strips of material, such as the strip 29, each vof length suitable to the purpose, separately will be removed or torn from said roll of material to be useful for application to the hollow cylindrical shell I0 of the holder.

The hollow cylindrical element I9 provides a longitudinal bore 3| defined by an internal cylindrical surface 32 ofsaid hollow cylindrical element, and the cam including the shaft 23 and the eccentric portion 25 is situated within said longitudinal bore in such manner that an external cylindrical surface 33 of said eccentric portion is always in comparatively close, but

, spaced, relation to said internal cylindrical surface 32 of the hollow cylindrical element I9, no matter to what position said shaft 23 and the cam may be rotated. More explicitly, the eX- ternal cylindrical surface 33 of the eccentric portion 25 is the part of said eccentric portion which is farthest from the shaft 23, and is adapted to rotate, with turning movement of said shaft. within the longitudinal bore 3l while spaced at distance from the internal cylindrical surface 32 of said hollow cylindrical element I9 a trifle less than a measurement representing double the thickness of a strip of material, such as 29, to be tightened about and fastened down against the circumference or perimeter of the hollow cylindrical shell I 0.

. -When aestriproft; material,A sucheas'. 29,'fis-1-to be;- tightenedifand. removablys-astened:aupOnl the holder, said strip Ais placed snugly :about @the circumference orperimeter Vcif--the-,hollcw .cylindrical shell 10: of.- said'fhclderfan'd thm-free op'- fastening position, as in: Itwill Ibeeeyident that .with :rotation of the cam to Athe-position as vin said Fig. v3, yfrom= the neighborhood of said cam Yas in` Fig. 4, Vthe aexternal cylindrical surface^33..ofthec eccentricportiom-25-.swi11 cause the ysuperimposed free,K opposite end, portions-330i the `strip29 .of material-ltoibezgrasped f between vthe. internal cylindrical surfacee32 of the hollow cylindricalelement .1 -9 and isad' .eX- ternal cylindrical snrfacepffsaid eccentric-por tion andv moved. Yfrom the .positionfof` said free E opposite .end,portionsas.,in said Fig.-v4,..where v.

the str ipofmaterial is more or=lessf1oosenpon the circumference.orfperimeteroffthefehollow cylindrical shell lIll,.to.the,.position .of A.the free opposite end portionsflaslin Eig. 3, .wherefv'said g.

strip of ymaterial is.tightly,.fastenedcaboutcand .j

upon said circumference Y`or.,perir`neter of .said hollow cylindrical shell. 'l*hat.is,.with..rotation ofthe cam to thepo'sition. as in,.liig.` 3,..the.ueccentric portion '25 will, puslnthe free `Opposite end portions 'Q30 of ,the strip 0f -.rnat'riali 'Llp against Vthe intern-a1 cylindrical.surfacei'f32,f the hollow cylindrical element .lS-.andlcause said free opposite endr portions to'loe `slid.,olversaid internal ,cylindrical surface to the. positionzasin said Fig. 3, so .that said stripof material wilLloe g made taut, or stretched, upon jthe circumference or'perimeterfof the 'hollow cylindrical 'shell Ill. Evidently, while 'being moved l'from :theirposition as in Fig.. 4to their position-as .inEigf 3 the free opposite end portions 30 P.will :slide over the spaced apart, oppositely dispose'dsufacesd which define the side walls of the clearanceor passageway 22. InFig. 3 the externalicylindrical surface 33 of the eccentric portion".25 isL-at the l side 'of the shaft23:v directly opposite the clearance or passageway 2l `to cooperate withisaid internalcylindrical surface `32 to cause .said'jf'ree opposite end portions 130 :to ".be securly,`l.but removably, fastened within the 'long'i'tidinailbore 3l. -It `will beevidentthat upon rotation..of;the cam in either "direction vfrornits 'position as, in Fig/3, the strip of'materialwillbe released. 'IRO- tation of said `cam in 'direction opposite that indicated by the 'i arrowv in saidFig ".3 .actually will cause the end "portions *30 partially'tobe ejected from the bore`3l. -It also willbee'vident that the free oppositeerld poitti'onslit)V could be inserted inthe longitudinal :bore "3| at .the side of 4the cam opposite thatin whichsho'wn in Fig.' 4,' and'said cam then rotated indirection oppositethat indicated by the` arrow totighten up and fasten .the strip 4of materialszg.

The external cylindrical surfacel33 :of-theel:-

centricl portion 25: is providedwith.spacedfapara z outwardly extending protuberancesfand the internal cylindrical surface,f32of-thehollow reylindrical element i9 is .providedwith spacedfapart, inwardly and circurnferentially,extendingpron tuberances 36. Said protuberanceslare for-the Gij purposeiofinsnringthatirotatiomofrsaicleccentric pontion`125;positivelylwill cause: the free :opposite end :portions of Y. the .strip :of: material, such .as 29, togetherzxto 'Lbeslidi over theginternal cylindrical surface 32 of the hollow-cylindrical 'element fl"9"':witht movement of thezcamyto its positionr'asxzinfEig.-3,;say from: its position as in Figwfi, ,'andfsaid.zprotuberances 35 and 36, in cooperation with eachiothen: are for the purpose of insuring -that said A free opposite end portions ci :thefstriprofkmaterial will :be fastened stably againstthezpossibility of accidental removal from orfdisplacementrin.theholder when the parts of saiduholderiaresituated as insaid Fig. .3.

i-More explicitly, there.` are two spaced apart, longitudinally extending` rows of Y spaced apart protuberances- 35,` each row,l as disclosed, including-threespaced .apart ,-protuberances. The two longitudinally extendingv rows of protuberances 35.are incomparatively.close :relation to each othenrandfsaidirowsaret at opposite sides of -a planegpassed .di-ametrically through each of. the hollow Icylindrical- :element I-9,.fthe shaft 23 and the-'hollowf cylindrical shell l0. Protuberances 351-in-tl-1e different rows are directly opposite eachptlier.A There tare, in vthe illustrated embodiment .-of-thef.-invent ion, two spaced apart, circumferentially `extending -protuberances 36, both viat, the` side-:of .-.the` -hollow cylindrical element i9n directly `opposite the clearancev or passageway 2 i including a circumferentially .extending'protnberance ,351 situated between each pair of :adjacent 'protuberances 35 of `,each 1ongitudinal; row.of, protuberancesv 35 upon the ee centricfportion y25. Thatisito say, each circumfe-rentiallyfextendingaprotuberance 36 is so located .uponv the` vinternalcylindrical surface 32 oftthechdllow cylindrical.'element- I9 that it will befbetweentandin spacedrelation to aplurality oft protuberancesupon the eccentric portion 25-,.when said xhollow cylindrical element'and-said eccentriwportion are relatively positioned asin Fig.3. .Statedrdifferently,when the --parts are situated asf-in=said=Fig.f3,there is, in the disclosure asimade, ,at least one 'protuberance 35 between andinfspacedrelationv to a plurality of cirouniferentially `.extending 4protulfierances 35, andatleastone circumferentially extending protuberance' SSLbctweenand in spaced relation to a.. plurality., of. protuberances- 35. Preferably, the circumferentially,extending protube'rances 36 will be of length to extend at least-the distancebetween the ,twospacedepart .Y rows of Vprotuberacces..arid;`.desirably, said protuberancesl' may terminate'beyondboth rows, of .protuberances- 35.

."It will be .apparentthat the protuloerances 2,5 can'bejsharpeedgedmrof nature to penetrate o1' enter the material ofthe free Aopposite end portonsldpf a strip.suchas 29, so that with rotational/.movement.ofthe.eccentric portion 2li-t0- wardan'd Ito 'the position Aasinllig.. 3 -both of sai-d freeoppos'ite endportions positively willvbe caused to4 be slidover .theinternal cylindrical surface 32of.the`.hllow cylindrical element I9. That-is,

- the construction andarrangcment can besuch of material employed upon the holder is intended to have but a single use. Stated differently, each strip of material, such as Z9, removed from the holder after performing its intended service ordinarily is discarded.

Alsoit will be apparent that the protuberances 35 and 36, in cooperation with each other, as well as with the external cylindrical surface 33 of the eccentric portion 25 of the cam and the internal cylindrical surface 32 of the hollow cylindrical element I9, will confine and limit the free opposite end portions 30 of the strip of material when inserted and fastened in the holder as in Fig. 3 against the possibility of accidental removal from or displacement in said holder. Clearly, during rotational movement of the eccentric portion 25 toward and to the position as in Fig. 3 from the neighborhood in which said eccentric portion is shown in Fig. 4 the pro-v tuberances 35 will cause the free, opposite, superimposed end portions 30 to be slid over the circumferentially extending protuberances 36, and when the eccentric portion has reached its posi tion as in said Fig. 3, the protuberances 35 and 36 will, in cooperation with each other, cause said end portions tightly to be grasped between said protuberances 35 and -Sfyas well as between the cylindrical surfaces 33 and 32 supporting the protuberances. In practice, the inner surfaces of the circumferentially extending protuberances 36 desirably will terminate in a circumference somewhat within that of the end portion 3D which is outermost when the strip of material is fastened as in Fig, 3, so that the protuberances 35 and 36 will cause the free opposite end portions 30 to be crimped, or include a wave, when secured in the holder. In order that the protuberances 35 can cause said free opposite end portions 3 readily to be slid over the circumferentially extending protuberances 36 these latter protuberances merge smoothly at their opposite end portions 3? into the internal cylindrical surface 32 of the hollow cylindrical element I9.

In some instances it might be desirable to set the external cylindrical surface 33 at location from the internal cylindrical surface 32 equal at least to the combined thickness of the superimf posed end portions 3G. In any event, the lprotuberances and 35, when employed, will cause said end portions 3D to be confined under pressure between said protuberances.

What is claimed is:

1. A holder comprising a member providing an outer circumferential surface, vsaid member including a bore providing an internal cylindrical surface having an inwardly extending protuberance thereon and there being a passageway leading from said outer circumferential surface to saidbore, and a cam adapted to be actuated within said bore, the outer circumferential surface of said member being adapted to receive a strip of material to be lfastened about and upon said outer circumferential surface, and superimposed portions of said strip of material being adapted to be inserted through said passageway.

into said bore at a side of said cam, the cam including an external cylindrical surface thereof having an outwardly extending protuberance thereon adapted to be rotated in proximate relation to the internal cylindrical surface of said bore to pull said superimposed portions of the strip of material inwardly of said bore thus to cause said strip to be made taut upon said outer circumferential surface, and the protuberances upon said external and internal cylindrical surfaces in cooperation with each other being adapted`to cause said superimposed portions of the strip removably to be fastened in said holder.

2. A holder comprising a hollow shell providing an outer circumferential surface and spaced apart end walls, a hollow tubular element extendf ingbetween and mounted in said end Walls and providing a bore defined by an internal cylindrical surface of said hollow tubular element, there being a passageway leading from said outer circumferential surface through said hollow tubular element to said bore, and a cam adapted to be actuated withinsaid bore, the outer circumferential surface of said shell being adapted to receive a strip of material to be fastened about and upon said outer circumferential surface, and superimposed portions of said strip of material beingadapted to be inserted through said passag'eway into said bore at a side of said cam, the cam including portions thereof mounted in said end walls, respectively, and an external cylindrical surface thereof adapted to be rotated in proximate relation to the internal cylindrical surface of said hollow tubular element.

3. The combination as specified in claim 2, and bearings upon said spaced apart end walls concentric with said outer circumferential surface for rotatably mounting said shell.

4. The combination as specified in claim 2, bearings upon said spaced apart end walls concentric with said outer circumferential surface for rotatably mounting said shell, said hollow tubular element and cam being at a side of said bearings adjacent the outer circumferential surface of said shell,A and a counterweight supported by said hollow shell at the side of said bearings oppositesaid hollow tubular element and cam.

5. The combination asL specified in claim 2, bearings upon said spaced apart end walls concentric with said outer circumferential surface for rotatably mounting said shell, said hollow tubular element and cam being at a side of said bearings adjacent the outer circumferential surface of said shell, a counterweight .supported by said end walls at the side of said bearings opposite said hollow tubular element and cam, and a `connector member extending between said end walls.

6. A holder comprising a hollow shell providing an outer circumferential surface and spaced apart end walls, a hollow tubular element extending between and mounted in said end Walls and providing a bore defined by an internal cylindr1cal surface of said hollow tubular element, there being a passageway leading from said outer circumferential surface through said hollow tubular element to said bore, and a cam adapted to be actuated within saidbore, the outer circumferential surface of saidshell being adapted to re' ce1ve a strip of material tobe fastened about and upon said outer circumferential surface, and superimposed portions of said strip of material being adapted to be inserted through said passageway into said bore at a side of said cam, the cam including portions thereof mounted in said end walls, respectively, and an external cylindrical surface thereof adapted to be rotated in proximate relation to the internal cylindrical surface .of said hollow tubular element to pull said superimposed portions of the strip of material inwardly of said hollow tubular element thus to cause said strip to be made taut upon said outer circumferential surface and said external and internal surfaces of said cam and said hollow tubular element, respectively, in cooperation with each other being adapted to cause said superimposed portions of the strip removably to be fastened in said holder.

7. A holder comprising a member providing an outer circumferential surface, said member including a bore providing an internal cylindrical surface and there being a passageway leading from said outer circumferential surface to said bore, a cam adapted to be actuated Within said bore, the outer circumferential surface of said member being adapted to receive a strip of material to be fastened about and upon said outer circumferential surface, and superimposed portions of said strip of material being adapted to be inserted through said passageway into said bore at a side of said cam, the cam including an external cylindrical surface thereof adapted to be rotated in proximate relation to the internal cylindrical surface of said bore to pull said superimposed portions cf the strip of material inwardly of said bore thus to cause said strip to be made taut upon said outer circumferential surface, and said external and internal cylindrical surfaces in cooperation with each other being adapted to cause said superimposed portions of the strip removably to be fastened in said holder and complemental protuberances upon the external cylindrical surface of said cam and the internal cylindrical surface provided by said bore.

8. A holder comprising a member providing an outer circumferential surface, said member including a bore providing an internal cylindrical surface and there being a passageway leading from said outer circumferential surface to said bore, a cam adapted to be actuated within said bore, the outer circumferential surface of said member being adapted to receive a strip of material to be fastened about and upon said outer circumferential surface, and superimposed portions of said strip of material being adapted to be inserted through said passageway into said bore at a side of said cam, the cam including an external cylindrical surface thereof adapted to be rotated in proximate relation to the internal cylindrical surface of said bore to pull said superimposed portions of the strip of material inwardly of said bore thus to cause said strip to be made taut upon said youter circumferential surface, and said external and internal cylindrical surfaces in cooperation with each other being adapted to cause said superimposed portions of the strip removably to be fastened in said holder, a plurality of spaced apart, longitudinally extending rows of spaced apart protuberances upon the external cylindrical surface of said cam, and a plurality of spaced apart, circumferentially extending protuberances upon said internal cylindrical surface provided by said bore, said circumferentially extending protuberances being disposed at the side of said bore directly opposite said passageway and there being protuberances upon said external cylindrical surface at either side of and in spaced relation to a circumferentially extending protuberance upon said internal cylindrical surface and circumferentially extending protuberances upon said internal cylindrical surface at either side of and in spaced relation to a protuberance upon said external cylindrical surface.

9. A holder comprising a member providing an outer circumferential surface, said member including a bore providing an internal cylindrical CII surface and there being a passageway leading from said outer circumferential surface to said bore, a cam adapted to be actuated within said bore, the outer circumferential surface of said member being adapted to receive a strip of material to be fastened about and upon said outer circumferential surface, and superimposed portions of said strip of material being adapted to be inserted through said passageway into said bore at a side of said cam, the cam including a shaft thereof concentric with the internal cylindrical surface of said bore and an external cylindrical surface thereof adapted to be rotated at spaced distance from said internal cylindrical surface less than a measurement representing the total thickness of said superimposed portions to pull the superimposed portions inwardly of said bore thus to cause said strip to be made taut upon said outer circumferential surface, and said externa-l and internal cylindrical surfaces in cooperation with each other being adapted to cause said super imposed portions of the strip removably to be fastened in said holder, a plurality of spaced apart, longitudinally extending rows cf spaced apart protuberances upon the external surface of said cam, and a plurality of spaced apart, circumferentially extending protuberances upon said internal surface provided by said bore.

10. A holder comprising a member providing an outer circumferential surface, said member including a bore providing an internal cylindrical surface and there. being a passageway leading from said outer circumferential surface to said bore, a cam adapted to be actuated within said bore, the outer circumferential surface of said member being adapted to receive a strip of material to be fastened about and upon said outer circumferential surface, and superimposed portions of said strip of material being adapted to be inserted through said passageway into said bore at a side of said cam, the cam including a shaft thereof concentric with the internal cylindrical surface of said bore and an external cylindrical surface thereof adapted to be rotated at spaced distance from said internal cylindrical surface less than a measurement representing the total thickness of said superimposed portions to pull the superimposed portions inwardly of said bore thus to cause said strip to be made taut upon said outer circumferential surface, and said external and internal cylindrical surfaces in cooperation with each other being adapted to cause said superimposed portions of the strip removably to be fastened in said holder, a plurality of spaced apart,vlongitudinally extending rows of spaced apart protuberances upon the external cylindrical surface of said cam, and a plurality of spaced apart, circumferentially extending protuberances upon said internal cylindrical surface provided by said bore, said circumferentially extending protuberances being disposed at the side of said -bore directly opposite said passageway and there being protuberances upon said external cylindrical surface at either side of and in spaced relation to a ciicumferentially extending priotuberance upon said internal cylindrical surface and circumferentially extending protuberances upon said internal cylindrical surface at either side of and in spaced relation to a protuberance upon said external cylindrical surface.

CARL F. ANDERSON. 

